Improvement in fastening artificial teeth to metallic plates



dnitcd gisten gaat can,

HEMAN B. HALE, OF ROGKFORD, ILLINOIS.

Letters Patent No. 108,588, dated October 25, 1870; antedated October 21, 1870.

IMPROVEMENT INv FASTENING ARTIFICIALTEETH T METALLIC PLATES.

The Schedule referred to in these Letters Patent: and making part of the same.

To all whom 'it may concern: y

Be it known that I, HEMAN B. HALE, of the city of Rockford, and county of Winnebago and State of Illinois, have invented au Improved Method of Fastening Artificial Teeth to Metallic Dental-Plates; and I do hereby declare the following to be a full and clear description of the same, sudicient to enable those skilled in the art to which the invention appcrtains to make use of it.

In attaching teeth to gold, silver, and platina plates by means ot vulcanite or other combining material, it is common to solder metallic attachments of suitable forms to the plates in appropriate places to hold the This involves the expenditure of much time and la-A bor, and ismore or less`expensive pecuniarily.

In attempts to n'se aluminum plates in likemanner, an obstacle has been encountered in the want of -a solder that could be used with facility with that metal. l

A device to meet the diculties'j ust mentioned has been used to a limited extent, which consists in cutting through the plates upon the lingual side of vthe teeth, and raising partially-detached portionsinfthe v v into the shape of a head. These forms are but variations of one principle, that is, making the projections smaller at their bases than at their ends. Ihusv formed they will interlock with the combining material moi-c securely than the bent form, and are not liable to be straightened, loosened, or drawn out.

Another advantage in this method of forming the fastenings is that they can be placed in close proximity to the pins of the teeth, which will enable any one to avoid using so much of the combining material as would be cumbersome in the mouth, restrict the movements of the tongue, and interfere withthe speech ofthe wearer.

' 'Another part o f my invention consists inthe application and use of attachments about the borders of dental-plates near the margin of thegums. These attaclnnents are made by cutting through and projecting partially-detached portions of the plates, and forming the projections into dovetails or other suitable shapes, or by the use of' suitably-formed perforatious ot' the plates.

'lhese border attachments are lfor the purpose of enabling the operator to secure the teeth, and combining material `more iirmlyto the plate, and avoid undue thickness and prominence, while he secures sulcient strength and stability and a well-finished border. teeth, and combining material securely tothe plates.

An idea of this 'invention may be gained from the accompanying drawing.

` The-tastening points being completed, the teeth are arrangednpon the plate, and wax molded about the teeth and gums in like manner as for vnlcanite work. A mold of the case is then'made, like' those used .for vulcanizing or casting,'and the denture is completed by the various manipulations and processes known to dentists. i

'The materialiused for combining teeth with plates having this invention applied may. be vulcanite or other suitable'substance, and must be used in a softened, plastic, duid, or melted condition, completely enveloping the fastening points, lling the perforations, and occupying all the space about the teeth and gums necessary1 to produce au impermeableinished, artistic denture.

Having thus described my invention, What I claim asf new, andv desire to secure by Letters Patent, is

1. The improved forni of attachment-s forsecuring teeth to dental-plates with a suitable combining material, by making the projections from the plate about the lingual side ot' the teeth smaller at their bases than at their ends, as described.

2. In combination with the fastenings about the lingualside of the teeth, the application of attachments about the 'borders of dental-plates, substan.

tiallyas described, for the purposes mentioned.

HEMAN B. HALE. Witnesses:

WILLIAM MARSHALL, CHARLES Wonks. 

